{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:04.461938", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2019-Jul-20_to_2019-Jul-25_281.0_55.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2019070000736}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "July 20 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 87945.74794634646}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["Hudson Bay"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 55.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 281.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 279.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 285.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.25, 54.5], [-80.03, 55.03], [-79.68, 55.18], [-79.65, 55.25], [-79.75, 55.5], [-79.53, 56.03], [-79.0, 56.25], [-78.75, 56.15], [-78.5, 56.25], [-78.25, 56.15], [-78.0, 56.25], [-77.75, 56.15], [-77.68, 56.18], [-77.53, 56.53], [-77.0, 56.75], [-76.47, 56.53], [-76.32, 56.18], [-75.97, 56.03], [-75.75, 55.5], [-75.85, 55.25], [-75.75, 55.0], [-75.97, 54.47], [-76.32, 54.32], [-76.47, 53.97], [-76.82, 53.82], [-76.97, 53.47], [-77.5, 53.25], [-77.75, 53.35], [-77.82, 53.32], [-77.97, 52.97], [-78.5, 52.75], [-79.03, 52.97], [-79.18, 53.32], [-79.53, 53.47], [-79.68, 53.82], [-80.03, 53.97], [-80.25, 54.5]]]]}, "2019-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.53, 56.03], [-80.0, 56.25], [-79.75, 56.15], [-79.5, 56.25], [-79.25, 56.15], [-79.0, 56.25], [-78.75, 56.15], [-78.68, 56.18], [-78.53, 56.53], [-78.0, 56.75], [-77.75, 56.65], [-77.5, 56.75], [-77.25, 56.65], [-77.0, 56.75], [-76.47, 56.53], [-76.32, 56.18], [-75.97, 56.03], [-75.75, 55.5], [-75.85, 55.25], [-75.75, 55.0], [-75.87, 54.7], [-75.75, 54.65], [-75.5, 54.75], [-75.25, 54.65], [-75.0, 54.75], [-74.47, 54.53], [-74.25, 54.0], [-74.47, 53.47], [-75.0, 53.25], [-75.25, 53.35], [-75.5, 53.25], [-75.75, 53.35], [-76.0, 53.25], [-76.25, 53.35], [-76.5, 53.25], [-76.75, 53.35], [-76.82, 53.32], [-76.97, 52.97], [-77.5, 52.75], [-77.75, 52.85], [-78.0, 52.75], [-78.25, 52.85], [-78.5, 52.75], [-78.75, 52.85], [-79.0, 52.75], [-79.53, 52.97], [-79.75, 53.5], [-79.65, 53.75], [-79.68, 53.82], [-80.03, 53.97], [-80.18, 54.32], [-80.53, 54.47], [-80.75, 55.0], [-80.65, 55.25], [-80.75, 55.5], [-80.53, 56.03]]]]}, "2019-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.15, 54.75], [-81.25, 55.0], [-81.03, 55.53], [-80.68, 55.68], [-80.53, 56.03], [-80.0, 56.25], [-79.75, 56.15], [-79.5, 56.25], [-79.25, 56.15], [-79.0, 56.25], [-78.75, 56.15], [-78.68, 56.18], [-78.53, 56.53], [-78.0, 56.75], [-77.75, 56.65], [-77.5, 56.75], [-77.25, 56.65], [-77.0, 56.75], [-76.47, 56.53], [-76.32, 56.18], [-75.97, 56.03], [-75.75, 55.5], [-75.85, 55.25], [-75.75, 55.0], [-75.87, 54.7], [-75.75, 54.65], [-75.5, 54.75], [-75.25, 54.65], [-75.0, 54.75], [-74.47, 54.53], [-74.25, 54.0], [-74.47, 53.47], [-75.0, 53.25], [-75.25, 53.35], [-75.5, 53.25], [-75.75, 53.35], [-76.0, 53.25], [-76.25, 53.35], [-76.5, 53.25], [-76.75, 53.35], [-76.82, 53.32], [-76.97, 52.97], [-77.5, 52.75], [-77.75, 52.85], [-78.0, 52.75], [-78.25, 52.85], [-78.5, 52.75], [-78.75, 52.85], [-79.0, 52.75], [-79.25, 52.85], [-79.5, 52.75], [-79.75, 52.85], [-80.0, 52.75], [-80.53, 52.97], [-80.68, 53.32], [-81.03, 53.47], [-81.25, 54.0], [-81.15, 54.25], [-81.25, 54.5], [-81.15, 54.75]]]]}, "2019-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.15, 53.75], [-81.25, 54.0], [-81.15, 54.25], [-81.25, 54.5], [-81.15, 54.75], [-81.25, 55.0], [-81.03, 55.53], [-80.68, 55.68], [-80.53, 56.03], [-80.0, 56.25], [-79.75, 56.15], [-79.5, 56.25], [-79.25, 56.15], [-79.0, 56.25], [-78.75, 56.15], [-78.68, 56.18], [-78.53, 56.53], [-78.0, 56.75], [-77.75, 56.65], [-77.5, 56.75], [-77.25, 56.65], [-77.0, 56.75], [-76.47, 56.53], [-76.25, 56.0], [-76.47, 55.47], [-76.82, 55.32], [-76.97, 54.97], [-77.32, 54.82], [-77.37, 54.7], [-77.25, 54.65], [-77.0, 54.75], [-76.75, 54.65], [-76.5, 54.75], [-76.25, 54.65], [-76.0, 54.75], [-75.75, 54.65], [-75.5, 54.75], [-75.25, 54.65], [-75.0, 54.75], [-74.47, 54.53], [-74.25, 54.0], [-74.47, 53.47], [-75.0, 53.25], [-75.25, 53.35], [-75.5, 53.25], [-75.75, 53.35], [-76.0, 53.25], [-76.25, 53.35], [-76.5, 53.25], [-76.75, 53.35], [-76.82, 53.32], [-76.97, 52.97], [-77.5, 52.75], [-77.75, 52.85], [-78.0, 52.75], [-78.25, 52.85], [-78.5, 52.75], [-78.75, 52.85], [-78.82, 52.82], [-78.97, 52.47], [-79.5, 52.25], [-79.75, 52.35], [-80.0, 52.25], [-80.25, 52.35], [-80.5, 52.25], [-81.03, 52.47], [-81.25, 53.0], [-81.15, 53.25], [-81.25, 53.5], [-81.15, 53.75]]]]}, "2019-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.15, 53.75], [-81.25, 54.0], [-81.15, 54.25], [-81.25, 54.5], [-81.15, 54.75], [-81.25, 55.0], [-81.03, 55.53], [-80.68, 55.68], [-80.53, 56.03], [-80.0, 56.25], [-79.75, 56.15], [-79.5, 56.25], [-79.25, 56.15], [-79.0, 56.25], [-78.75, 56.15], [-78.68, 56.18], [-78.53, 56.53], [-78.0, 56.75], [-77.75, 56.65], [-77.5, 56.75], [-77.25, 56.65], [-77.0, 56.75], [-76.47, 56.53], [-76.25, 56.0], [-76.47, 55.47], [-76.82, 55.32], [-76.97, 54.97], [-77.5, 54.75], [-77.75, 54.85], [-78.0, 54.75], [-78.25, 54.85], [-78.32, 54.82], [-78.47, 54.47], [-79.0, 54.25], [-78.47, 54.03], [-78.25, 53.5], [-78.47, 52.97], [-78.82, 52.82], [-78.97, 52.47], [-79.5, 52.25], [-79.75, 52.35], [-80.0, 52.25], [-80.25, 52.35], [-80.5, 52.25], [-81.03, 52.47], [-81.25, 53.0], [-81.15, 53.25], [-81.25, 53.5], [-81.15, 53.75]], [[-79.25, 54.35], [-79.32, 54.32], [-79.35, 54.25], [-79.32, 54.18], [-79.25, 54.15], [-79.0, 54.25], [-79.25, 54.35]]]]}, "2019-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.25, 54.0], [-81.15, 54.25], [-81.25, 54.5], [-81.03, 55.03], [-80.68, 55.18], [-80.65, 55.25], [-80.75, 55.5], [-80.53, 56.03], [-80.0, 56.25], [-79.75, 56.15], [-79.5, 56.25], [-79.25, 56.15], [-79.0, 56.25], [-78.47, 56.03], [-78.25, 55.5], [-78.47, 54.97], [-79.0, 54.75], [-79.25, 54.85], [-79.32, 54.82], [-79.35, 54.75], [-79.25, 54.5], [-79.35, 54.25], [-79.25, 54.0], [-79.35, 53.75], [-79.32, 53.68], [-78.97, 53.53], [-78.75, 53.0], [-78.97, 52.47], [-79.5, 52.25], [-79.75, 52.35], [-80.0, 52.25], [-80.25, 52.35], [-80.5, 52.25], [-81.03, 52.47], [-81.25, 53.0], [-81.15, 53.25], [-81.25, 53.5], [-81.15, 53.75], [-81.25, 54.0]]], [[[-78.25, 56.0], [-78.03, 56.53], [-77.5, 56.75], [-77.25, 56.65], [-77.0, 56.75], [-76.47, 56.53], [-76.25, 56.0], [-76.47, 55.47], [-77.0, 55.25], [-77.25, 55.35], [-77.5, 55.25], [-78.03, 55.47], [-78.25, 56.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.183320651809822}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.052273729959339}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.951445665061158, 6.043118728806405, 4.784178828705649, 5.323224413051207, 4.05022686722117, 4.2481895295799745]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.187378716052706, 2.5522310747506367, 2.287519174587999, 2.8544371224743372, 2.465254307554403, 3.038609018970476]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.523111430827146, -5.178099162111389, -5.92496058130901, -4.83591787628428, -4.017528590944695, -3.6090799822052153]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.0086081492680705, -6.800655463098735, -8.183320651809822, -6.773624761140127, -5.687428874407658, -4.237042387031806]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4732092820112535, -1.4681041921891742, -1.7634587099115149, -1.5582964654697125, -1.4833523036207963, -1.4067009784843314]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6381938255384256, -1.8682212089889683, -2.065922811247033, -1.91481879154655, -1.6756428706760493, -1.5769481918890496]}}